Damper regulator for furnaces



July 19, 1927.

1,636,537 B. J. TRYN ER DAMPER REGULATOR FOR FURNACES Filed Jan. 15,1927 2 Sheets-Sheet 1 B671 James Tamer 19 I927. July I B. J. TRYNERDAMPER REGULATOR FOR FURNACES 2 Sheets-Sheet 2 Filed Jan. 15, 1927iiicies 7Zyzzer Patented July 19, 1927.

UNITED. STATES.

PATENT OFFICE.

BEN JAMES TRYNER, OF CHICAGO, ILLINOIS, ASSIGNOR TO ENTERPRISE BOILER &

TANK WORKS, A CORPORATION OF ILLINOIS.

DAMPER REGULATOR FOR FURNACES.

Application filed J 'anuary 15, 1927. Serial No. 161,250.

This invention relates to an improved damper control for furnaces,boilers and gases or smoke into the basement or boiler room. This isparticularly necessary when introducing fresh fuel as the contact of thefuel with the hot fire generates a large. iniital volume of gas andsmoke. It has heretofore been proposed that the damper incohanism belinked up with the door so that the damper is operated automatically,but such an arrangement has the draw-back that it interferes with theuse of a thermostatic control as the damper is also needed to controlthe draft. It is therefore an object of this invention to provide animproved automatic and hand control for the damper connected up with thefiring door, but so constructed that the damper may be operated entirelyindependently of the operating mechanism of this invention. In whatfollows, I have confined my description tothe linkage between the doorand damper, no auxiliary or thermostatic control being shown.

Other and further objects of this invention will be apparent from thedisclosures in the specification and the accompanying drawings.

This invention (in a preferred form) is illustrated in the accompanyingdrawings and hereinafter more fully described.

On the drawings:

Figure 1 is a front elevation of a hot air furnace chosen to illustratethe device of this invention.

Figure 2 is a side elevation of the fnrr ace.

Figure 3 is a top view thereof as shown by the line IIIIII of Figure 1.

Figure at is a fragmentary section on the line IVIV of Figure 2.

Figure 5 is a fragmentary front elevation of a modified form of thisdevice as applied to the fire door. 5

Figure 6 is a bottom view on the line V.IVI of Figure 5.

As shown on the drawings:

A. hot air furnace is shown without its usual enveloping sheet ironjacket, the parts of interest to the present invention being the frontplate 10 having a fire door 11 hinged thereto at 12 and the smoke box13, with smoke pipe 14 leading therefrom and having a damper 15 therein,controlled by the damper lever 16. A rod 17 leads from the lever 16 to acrank 18 on a vertical shaft 19 journaled at 20 and 21 to the fire doorcasing or fire box, thelower end of the shaft 19 forming another crank22. The structure up to this point is common to both modifications.

In Figures 1 to 1, a spring 23 connects achain 24 to the crank 22, thechain passing through an aperture 25 in the front plate 10 below thedoor, then over one portion of the double pulley 28, and thence to anattachment 26 on the door 11, so that when the door is opened, the pullon the chain turns the vertical shaft 19 to open the damper 15. WViththe door closed, the chain permit-s unhampered operative movement of thedamper by any other operating mechanism.

A second chain 27 is also attached to the spring 23 and is thus securedto the crank 22 It passes over another portion of the double pulley 28and then through the aperture 25, the free end of this chain having aring 29 which may be engaged over a hook 30 on the front plate 10 tohold the damper open when the door is closed.

The modification of Figures 5 and 6 eliminates the second chain 27 byplacing the ring 29 in the end of the chain 24. which in this casepasses through anapcrtured lug 31 on the door 11, the ring being ongagedby the lug to operate the damper as before, while the ring can also bepulled away from the door and engaged on the hook 30 to hold the damperopen.

It will thus be seen that I have produced a simple and compact combineddamp-er control operable either automatically by the opening of the firedoor or independently thereof manually.

I am aware that many changes may be 'made, and numerous details ofconstruction may be varied through a wide range without departing fromthe principles of this invention, and I therefore do not purposelimiting the patent granted hereon, otherwise than necessitated bytheprior art.

I claim as my invention:

1. In a device of the class described. the combination of a damper, anda fire door, of a damper operating mechanism comprising linkagecontrolling the damper movement, a flexible connection theretoleading tothe fire door and adapted to open saiddamper upon opening said door.

2. In a device of the class described in combination with a stack damperand a fire door, a damper operating mechanism comprising a shaft,linkage connecting said damper and Said shaft whereby rotation of theshaft operates the damper, a crank on said shaft, a flexiblememberyieldingly connected to said crank and adapted to be engagetl by,said fire door to rotate. sa d sliai't, and means whereby said dampermay be opened independentlyof the Qpeningof said fire door.

3. In a device otthe class described the combination of a damper, and afire door of a, damper operatingmechanism comprising. linkag c n-trellnttt mp r mer nient, a flexible connection thereto leading to the fire,door and adapted to open said damper upon opening saiddoor, and meansassociated with said flexible'connection adapted to permit control ofthe damper operating mechanism independently of the fire door.

t, An operating connection between the damper and fire doorof a heatingplant,

comprising rotatable: vertical shafit; having, cranks at both ends, aconnection between one crank and the dampen ayieldingconr nectionbetween the other crank am door, and means adapted; to permit operationof said, yielding connection. independently of the operation of the firedoor. I

In testimony whereo'fi I; have hereunto snbt scribed my name.-

BENJAll-QES revere- 2 the fire

